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Articles by K. Velayudham
Total Records ( 7 ) for K. Velayudham
  N. Thavaprakaash and K. Velayudham
  Field experiments were conducted at Eastern Block farm, Tamil Nadu Agricultural University, Coimbatore during kharif 2002 (June to September) and summer 2003 (February to May) seasons to study the impact of varied crop geometry, short duration intercrops and INM practices on production potential of baby corn based intercropping systems. Two crop geometry levels (45X25 cm and 60X19 cm) and two short duration intercrops (Amaranthus and green gram) along with control (no intercrops) were taken in main plot. Recommended dose of fertilizers (100% NPK-N1) along with three INM practices [50% NPK + FYM + Azospirillum + phosphobacteria (N2), 50% NPK + poultry manure + Azospirillum + phosphobacteria (N3) and 50% NPK + goat manure + Azospirillum + phosphobacteria (N4)] were assigned to subplot in a split plot design. The trial was replicated thrice. The experimental results revealed that crop geometry and INM treatments significantly influenced on nutrient uptake of baby corn. Baby corn spaced at 60X19 cm recorded higher uptake of N, P and K as compared with 45X25 cm spacing. Intercropping systems did not influence the nutrient uptake. All the INM practices showed higher NPK uptake than N1. Among the three INM practices, the treatments N3 and N4 recorded significantly higher values than N2. Almost similar results were obtained in green cob yield of baby corn. BEY was higher with S2 than S1. Intercropped baby corn produced higher BEY than sole baby corn. The treatments N3 and N4 recorded significantly more BEY values as compared to N2 and N1. The correlation between NPK uptake and baby corn yields was positive and significant, however, between BEY and nutrient uptake was not significant during both the seasons.
  N. Thavaprakaash and K. Velayudham
  Field experiments were conducted during kharif (June-September) 2002 and summer (March-May) 2003 seasons at Eastern Block farm, Tamil Nadu Agricultural University, Coimbatore. The experiments were laid out in split plot design with two factors in main plots viz., crop geometry (45x25 cm (S1) and 60x19 cm (S2)) and intercropping systems [(sole baby corn (C1), baby corn + Amaranthus (C2) and baby corn + green gram (C3)] and four INM practices [(100% recommended NPK (150:60:40 kg ha-1) alone (N1); 50% NPK + FYM + Azospirillum + phosphobacteria (N2); 50% NPK of baby corn + Poultry manure + Azospirillum + phosphobacteria (N3) and 50% NPK of baby corn + Goat manure + Azospirillum + phosphobacteria (N4)] were allotted in sub plots. The results revealed that barring at 25 DAS, S2 registered higher light interception than S1. Intercropped baby corn recorded greater light interception than sole baby corn at 25 DAS and 45 DAS. The results at later stages were comparable. The treatments N3 and N4 recorded higher light interception than N1 and N2.. Similarly, higher green cob yield and Baby corn Equivalent Yield (BEY) registered at S2 than S1. Under intercropping situation, baby corn yield was not varied but BEY was significantly higher in C2 and C3 than C1. Similar to light interception, baby corn yield and BEY were significantly higher with N3 and N4 than the rest. Strong positive and significant correlation between light interception and baby corn yield was noticed at all the stages except at 25 DAS during summer 2003 season. Whereas, the correlation between BEY and light interception was significant at 25 DAS during kharif 2002 and at 25 and 45 DAS during summer 2003 season.
  N. Thavaprakaash , K. Velayudham and V.B. Muthukumar
  Field experiments were conducted during late rabi 2002 and 2003 seasons at Eastern Block farm of Tamil Nadu Agricultural University, Coimbatore, India. The texture of the experimental fields is sandy clay loam. The experiments were laid out in split plot design. Two factors viz., crop geometry (45x25 cm (S1) and 60x19 cm (S2)) and intercropping systems (Baby corn alone (C1), Baby corn + radish (C2), Baby corn + coriander (C3)) were taken in main plots and four INM practices (100% recommended NPK alone (N1); 50% NPK + FYM + Azospirillum + phosphobacteria (N2); 50% NPK + poultry manure + Azospirillum + phosphobacteria (N3) and 50% NPK + goat manure + Azospirillum + phosphobacteria (N4)) were assigned to sub plots. The experimental results revealed that baby corn and fodder yields were higher at 60x19 cm spacing level as compared with S1. Intercropping systems did not influence on baby corn and fodder yields. The treatments N3 and N4 registered higher baby corn and fodder yields than N1 and N2. Neither crop geometry nor intercropping systems did influence on fodder quality of baby corn. All the three INM practices (N2, N3 and N4) recorded higher values of quality parameters than N1. However, N3 and N4 values were significantly higher than N2.
  N. Thavaprakaash and K. Velayudham
  .
  N. Thavaprakaash , K. Velayudham and L. Gurusamy
  Field experiments were conducted on sandy clay loam soils during late Rabi (January-March) and Kharif (June-September) seasons of 2002 to study the effect of herbicides at low concentrations as growth regulators on productivity of baby corn. The experiment was laid out in randomized complete block design with three herbicides each at two different concentrations (2,4-D @ 25 and 50 ppm, atrazine @ 50 and 100 ppm and glyphosate @ 5 and 10 ppm) along with control (water spray) and absolute control (no spray). The results were indicative that low herbicide concentrations promoted the growth and yield attributes in baby corn. Application of 2,4-D @ 50 ppm significantly increased growth parameters (plant height, number of green leaves plant-1, LAI and DMP) and yield attributes viz., length of cob and corn, weight of cob and corn, whereas significantly reduced cob-corn ratio, in comparison with 2,4-D @ 25 ppm and both concentrations of either atrazine or glyposate. Phenological stages such as days to tassel emergence and cob initiation and yield attributes viz., width of cob and corn, number of cobs plant-1, No. of cobs ha-1 were not significantly influenced by the herbicides. Increased growth parameters (LAI and DMP), yield attributes (length of cob and corn, weight of cob and corn) due to 2,4-D @ 50 ppm led to higher green cob yield (14.2% over control) and green fodder yield of baby corn over control.
  N. Thavaprakaash , R. Jagannathan , K. Velayudham and L. Gurusamy
  Analytical study was carried out to study the influence of phenology and accumulated heat units of baby corn in different seasons. Baby corn crop was raised during late rabi 2002, kharif 2002, late rabi 2002-03 and summer 2003 seasons. The observations on days required for attainment of different phenophases viz., seedling, peak vegetative, tasseling, silking, first harvest and last harvest were recorded. Heat units such as Growing Degree Days (GDD), Photo Thermal Units (PTU), Helio Thermal Units (HTU), Relative Temperature Disparity (RTD), Heat Unit Efficiency (HUE), Photo Thermal Index (PTI) and Seasonal efficiency were worked for different seasons of baby corn. The yield obtained during four seasons of baby corn crop was related with the different heat units calculated during crop growth seasons. The results revealed that among the different indices GDD, HTU, PTU and RTD had negative relationship whereas HUE, PTI and Seasonal efficiency had positive relationship with yield of baby corn. Thus, the indices such as HUE, PTI and Seasonal efficiency are seem to be effective in taking into account and expressing the effect of varying ambient temperature on the duration between the phenological events for comparing the crop response to the ambient temperature between different phenological stages.
  K. Krishna Surendar , D. Durga Devi , I. Ravi , P. Jeyakumar and K. Velayudham
  The main aim for this field experimental study is to screening of various banana cultivars and hybrids for water deficit tolerance through antioxidative enzymes and yield. The field experiment was conducted at National Research Centre for Banana to screen the banana cultivars and hybrids for water deficit tolerance and to elucidate information on antioxidative enzymes mechanism correlated with yield of banana cultivars and hybrids. The methodology of this experimental were analyzed by split plot design and has two treatments considered as main plot (M) viz., control plot taken as M1 and water deficit plot taken as M2 and also the cultivars and hybrids were considered as sup plots (S). The stress was imposed according to the Available Soil Moisture (ASM) and this ASM was measured by using pressure plate membrane apparatus. The experimental data were significantly varied between the treatments and also cultivars and hybrids. The antioxidative enzymes of catalase, super oxide dismutase and ascorbate peroxidase were significantly enhanced during water deficit conditions. Among the twelve cultivars and hybrids, Karpuravalli, Karpuravalli x Pisang Jajee, Saba and Sannachenkathali was identified as tolerant to water stress with highly accelerated by water stress treatment in the range of 23 to 32% over Control in Catalase (CAT), Super Oxide Dismutase (SOD) and Ascorbate Peroxidase (APX) leads to reduced the cellular membrane damaged by reactive oxygen species and get higher yield; whereas, Matti, Pisang Jajee x Matti, Matti x Anaikomban and Anaikomban x Pisang Jajee were notified as sensitive cultivars and hybrids with lesser increase in antioxidative enzyme activity of 15% than control which is leads to get very low yield.
 
 
 
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